title: Kinetics of substrate degradation and electricity generation in anodic denitrification microbial fuel cell (AD-MFC).
abstract: Effect of substrate concentration on substrate degradation and electricity generation in anodic denitrification microbial fuel cell (AD-MFC) was investigated over a broad range of substrate concentrations. Substrate degradation rates and power generation could be promoted with increasing substrate concentration in a certain range, but both of them would be inhibited at high substrate concentrations. Maximum denitrification rate of 1.26 ± 0.01 kg NO(-)-N/m(3)d and maximum output voltage of 1016.75 ± 4.74 mV could be achieved when initial NO3(-)-N concentration was 1999.95 ± 2.86 mg/L. Based on Han-Levenspiel model, kinetics of substrate degradation and power generation in the AD-MFC were established. According to the kinetic model, the half-saturation coefficient and the critical inhibitory concentration for nitrate were more than 200 and 4300 mg/L, respectively. The results demonstrated that AD-MFC was capable of treating nitrate-containing wastewater and generating electricity simultaneously, and tolerant to high strength nitrate-containing wastewater.
authors.affiliation: Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China.
authors.forename: Jiqiang
authors.initials: J
authors.lastname: Zhang
authors.forename: Ping
authors.initials: P
authors.lastname: Zheng
authors.forename: Meng
authors.initials: M
authors.lastname: Zhang
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
authors.forename: Tingting
authors.initials: T
authors.lastname: Chen
authors.forename: Zuofu
authors.initials: Z
authors.lastname: Xie
authors.forename: Jing
authors.initials: J
authors.lastname: Cai
authors.forename: Ghulam
authors.initials: G
authors.lastname: Abbas
mesh_terms: D001673:Biodegradation, Environmental; D001674:Bioelectric Energy Sources; D057919:Biological Oxygen Demand Analysis; D058440:Denitrification; D004560:Electricity; D004566:Electrodes; D007700:Kinetics; D008962:Models, Theoretical; D009566:Nitrates / Q000378:metabolism
chemical_list: D009566:Nitrates
keywords: Anodic denitrification microbial fuel cell (AD-MFC); Kinetic characteristics; Substrate concentration; Substrate inhibition